package com.security.securityproject;

import HttpHelper.HttpPostHelper;
import android.accounts.Account;
import android.accounts.AccountManager;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.telephony.TelephonyManager;
import android.text.TextUtils;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.View;
import android.view.inputmethod.EditorInfo;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import com.security.SecutiryTools.Aes;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.math.BigInteger;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Random;

/**
 * Activity which displays a login screen to the user, offering registration as
 * well.
 */
public class RegisterActivity extends Activity {
	/**
	 * A dummy authentication store containing known user names and passwords.
	 * TODO: remove after connecting to a real authentication system.
	 */
	private static final String[] DUMMY_CREDENTIALS = new String[] {
			"foo@example.com:hello", "bar@example.com:world" };

	/**
	 * The default email to populate the email field with.
	 */
	public static final String EXTRA_EMAIL = "com.example.android.authenticatordemo.extra.EMAIL";

	/**
	 * Keep track of the login task to ensure we can cancel it if requested.
	 */

	private UserLoginTask mAuthTask = null;
	

	// Values for email and password at the time of the login attempt.
	private String mEmail;
	private String mPassword;
    private static final int SERVERPORT = 6000;
    private static final String SERVER_IP = "192.168.0.13";

	// UI references.
	private EditText mEmailView;
	private EditText mPasswordView;
	private View mLoginFormView;
	private View mLoginStatusView;
	private TextView mLoginStatusMessageView;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		setContentView(R.layout.activity_register);

		// Set up the login form.
		mEmail = getIntent().getStringExtra(EXTRA_EMAIL);
		mEmailView = (EditText) findViewById(R.id.email);
		mEmailView.setText(mEmail);

		mPasswordView = (EditText) findViewById(R.id.password);
		mPasswordView
				.setOnEditorActionListener(new TextView.OnEditorActionListener() {
					@Override
					public boolean onEditorAction(TextView textView, int id,
							KeyEvent keyEvent) {
						if (id == R.id.login || id == EditorInfo.IME_NULL) {
							attemptLogin();
							return true;
						}
						return false;
					}
				});

		mLoginFormView = findViewById(R.id.login_form);
		mLoginStatusView = findViewById(R.id.login_status);
		mLoginStatusMessageView = (TextView) findViewById(R.id.login_status_message);

		findViewById(R.id.sign_in_button).setOnClickListener(
				new View.OnClickListener() {
					@Override
					public void onClick(View view) {
						attemptLogin();
					}
				});
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		super.onCreateOptionsMenu(menu);
		getMenuInflater().inflate(R.menu.register, menu);
		return true;
	}

	/**
	 * Attempts to sign in or register the account specified by the login form.
	 * If there are form errors (invalid email, missing fields, etc.), the
	 * errors are presented and no actual login attempt is made.
	 */
	public void attemptLogin() {
		if (mAuthTask != null) {
			return;
		}

		// Reset errors.
		mEmailView.setError(null);
		mPasswordView.setError(null);

		// Store values at the time of the login attempt.
		mEmail = mEmailView.getText().toString();
		mPassword = mPasswordView.getText().toString();

		boolean cancel = false;
		View focusView = null;

		// Check for a valid password.
		if (TextUtils.isEmpty(mPassword)) {
			mPasswordView.setError(getString(R.string.error_field_required));
			focusView = mPasswordView;
			cancel = true;
		} else if (mPassword.length() < 4) {
			mPasswordView.setError(getString(R.string.error_invalid_password));
			focusView = mPasswordView;
			cancel = true;
		}

		// Check for a valid email address.
		if (TextUtils.isEmpty(mEmail)) {
			mEmailView.setError(getString(R.string.error_field_required));
			focusView = mEmailView;
			cancel = true;
		} else if (!mEmail.contains("@")) {
			mEmailView.setError(getString(R.string.error_invalid_email));
			focusView = mEmailView;
			cancel = true;
		}

		if (cancel) {
			// There was an error; don't attempt login and focus the first
			// form field with an error.
			focusView.requestFocus();
		} else {
			// Show a progress spinner, and kick off a background task to
			// perform the user login attempt.
			mLoginStatusMessageView.setText(R.string.login_progress_signing_in);
			showProgress(true);
			mAuthTask = new UserLoginTask();
			mAuthTask.execute((Void) null);
			
		}
	}

	/**
	 * Shows the progress UI and hides the login form.
	 */
	@TargetApi(Build.VERSION_CODES.HONEYCOMB_MR2)
	private void showProgress(final boolean show) {
		// On Honeycomb MR2 we have the ViewPropertyAnimator APIs, which allow
		// for very easy animations. If available, use these APIs to fade-in
		// the progress spinner.
		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2) {
			int shortAnimTime = getResources().getInteger(
					android.R.integer.config_shortAnimTime);

			mLoginStatusView.setVisibility(View.VISIBLE);
			mLoginStatusView.animate().setDuration(shortAnimTime)
					.alpha(show ? 1 : 0)
					.setListener(new AnimatorListenerAdapter() {
						@Override
						public void onAnimationEnd(Animator animation) {
							mLoginStatusView.setVisibility(show ? View.VISIBLE
									: View.GONE);
						}
					});

			mLoginFormView.setVisibility(View.VISIBLE);
			mLoginFormView.animate().setDuration(shortAnimTime)
					.alpha(show ? 0 : 1)
					.setListener(new AnimatorListenerAdapter() {
						@Override
						public void onAnimationEnd(Animator animation) {
							mLoginFormView.setVisibility(show ? View.GONE
									: View.VISIBLE);
						}
					});
		} else {
			// The ViewPropertyAnimator APIs are not available, so simply show
			// and hide the relevant UI components.
			mLoginStatusView.setVisibility(show ? View.VISIBLE : View.GONE);
			mLoginFormView.setVisibility(show ? View.GONE : View.VISIBLE);
		}
	}

	/**
	 * Represents an asynchronous login/registration task used to authenticate
	 * the user.
	 */
	public class UserLoginTask extends AsyncTask<Void, Void, Integer> {
		@Override
		protected Integer doInBackground(Void... params) {
			// TODO: attempt authentication against a network service.

			try {
				 HttpPostHelper posthelper = new HttpPostHelper();
				// Simulate network access.



TelephonyManager tm = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);

String device_id = tm.getDeviceId();





Thread.sleep(2000);
                 Socket socket;
                InetAddress serverAddr = null;

                serverAddr = InetAddress.getByName(SERVER_IP);
                socket = new Socket(serverAddr, SERVERPORT);

                PrintWriter out = new PrintWriter(socket.getOutputStream(),
                        true);
                BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
                String buffer=null;
                BigInteger primeNumber,base,A,b,B,K;


                buffer = in.readLine();
                primeNumber= new BigInteger(buffer);


                buffer = in.readLine();
                base=  new BigInteger(buffer);


                buffer= in.readLine();
                A=  new BigInteger(buffer);
                b= BigInteger.probablePrime(64,new Random());

                B= base.modPow(b,primeNumber);
                out.print(B.toString() + "\n");
                out.flush();
                K= A.modPow(b,primeNumber);

                byte[] bytesOfMessage = K.toByteArray();
                MessageDigest md = MessageDigest.getInstance("MD5");
                byte[] thedigest = md.digest(bytesOfMessage);

                out.print(Aes.encrypt("register",thedigest));
                out.flush();

                out.print(Aes.encrypt(device_id,thedigest));
                out.flush();

                out.print(Aes.encrypt(mEmail,thedigest));
                out.flush();

                out.print(Aes.encrypt(mPassword,thedigest));
                out.flush();

                buffer=in.readLine();




                return Integer.parseInt(Aes.decrypt(buffer,thedigest));
			} catch (InterruptedException e) {
				return 0;
			} catch (UnknownHostException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } catch (NoSuchAlgorithmException e) {
                e.printStackTrace();
            } catch (Exception e) {
                e.printStackTrace();
            }

return 0;
        }

		@Override
		protected void onPostExecute( Integer success) {
			mAuthTask = null;
			showProgress(false);

			if (success==1) {
				Toast.makeText(getApplicationContext(),
						"You are Successfully Registred",
						Toast.LENGTH_SHORT).show();


				finish();
			}

            if(success==2)
            {
                Toast.makeText(getApplicationContext(),
                        "This device is already registered",
                        Toast.LENGTH_SHORT).show();


                finish();
            }
            if(success==3)
            {
                Toast.makeText(getApplicationContext(),
                        "This email is already registered",
                        Toast.LENGTH_SHORT).show();

                mEmailView
                        .setError("Try another email");
                mEmailView.requestFocus();

            }
		}

		@Override
		protected void onCancelled() {
			mAuthTask = null;
			showProgress(false);
		}
	}
}
